Have questions about battery systems or want personalised advice for your home?
Contact Us →Have questions about battery systems or want personalised advice for your home?
Contact Us →How a 5kW solar system fills a 13.5kWh battery each month
96% of battery charging from solar
In winter months, grid charging tops up your battery. With the right energy plan, you can charge during off-peak periods at very low rates - or even free.
Monthly averages based on typical weather. Cloudy days and seasonal variation mean some days will need grid top-up to fully charge your battery. Assumes ~35% of daily usage (5 kWh) during solar hours.
Bunbury offers excellent solar conditions typical of the WA southwest, making batteries a smart investment.
Bunbury is served by Western Power. With 5.2 average daily sun hours, a well-sized battery system can significantly reduce grid dependence and electricity costs.
Bunbury residents qualify for the Cheaper Home Batteries Program:
From 1 July 2025, WA offers state battery rebates that stack with the federal rebate - up to $5,000-$7,500 total for a 10kWh battery.
Bunbury residents can access both the federal Cheaper Home Batteries rebate (~$372/kWh) AND the WA Residential Battery Scheme ($130/kWh for Synergy customers). Combined, a 10kWh battery can get ~$5,020 in rebates.